阅读说明：本技术 双目望远镜及其制造方法 (Binocular telescope and manufacturing method thereof ) 是由 兵藤正光 于 2017-12-12 设计创作，主要内容包括：提供一种能够在广范围内校正像抖动并且能够高精度地校正像的抖动的具有测距功能的双目望远镜及其制造方法。本发明是一种双目望远镜(1),其特征在于,具有：双目望远镜壳体(2)；物镜系统(4)；目镜系统(6)；一对手抖动校正透镜系统(8),所述一对手抖动校正透镜系统(8)用于使像稳定化；透镜致动器(10),其用于驱动手抖动校正透镜系统；抖动检测传感器(12)；控制装置(14),其对透镜致动器进行控制；激光光源(16),其经由第一手抖动校正透镜系统来从第一物镜系统射出激光；受光元件(22),其经由第二物镜系统和第二手抖动校正透镜系统来接收被观察对象物反射的激光；以及运算装置(20),其基于由受光元件接收到的激光来计算到观察对象物的距离。(The invention provides binoculars with a distance measuring function capable of correcting image shake within range and correcting image shake with high precision and a method for manufacturing the same, the invention is binoculars (1) characterized by comprising a binocular housing (2), an objective lens system (4), an eyepiece lens system (6), a hand shake correction lens system (8), the hand shake correction lens system (8) for stabilizing an image, a lens actuator (10) for driving the hand shake correction lens system, a shake detection sensor (12), a control device (14) for controlling the lens actuator, a laser light source (16) for emitting laser light from the objective lens system via the hand shake correction lens system, a second objective lens light receiving element (22) for receiving laser light reflected by an object to be observed via the second objective lens system and the second hand shake correction lens system, and an arithmetic device (20) for calculating a distance to the object to be observed based on the laser light received by the light receiving element.)

1, kinds of binocular telescope, characterized by, possesses:

a binocular housing;

pairs of objective lens systems;

pairs of eyepiece systems, the pairs of eyepiece systems respectively magnifying the images formed by the pairs of objective lens systems respectively;

opponent shake correction lens system, the opponent shake correction lens system being disposed on an optical path between the objective lens system and the eyepiece lens system for stabilizing images respectively formed by the pair of objective lens systems;

a shake detection sensor that detects shake of the binocular housing;

an th lens actuator that drives a th one of the hand shake correction lens systems in a plane orthogonal to an optical axis;

a second lens actuator that drives a second hand shake correction lens system of the hand shake correction lens systems in a plane orthogonal to the optical axis;

a control device that independently controls the th lens actuator and the second lens actuator based on a detection signal obtained by the shake detection sensor;

a laser light source that emits laser light for distance measurement from a th one of the objective lens systems via the th handshake correction lens system;

a light receiving element for receiving the laser beam emitted from the th objective lens system and reflected by the object to be observed via the second objective lens system and the second hand shake correction lens system of the objective lens systems, and

an arithmetic device for calculating a distance to the observation target object based on the laser light received by the light receiving element,

wherein the control device controls the lens actuator and the second lens actuator in such a manner that positions of respective images formed by the objective lens system and the second objective lens system in the vertical direction are synchronized.

2. The binocular telescope of claim 1,

the control device further controls the lens actuator and the second lens actuator in such a manner that positions of respective images formed by the objective lens system and the second objective lens system in the horizontal direction are synchronized.

3. The binocular telescope of claim 2,

the control device controls the driving of each lens actuator so that the driving amount of the th handshake correction lens system driven by the th lens actuator is substantially equal to the driving amount of the second handshake correction lens system driven by the second lens actuator.

4. The binocular telescope of any of claims , wherein the first and second arms are substantially parallel,

the control device includes a memory that stores an adjustment table obtained by adjusting so that a difference between a driving amount of the -th camera shake correction lens system driven by the -th lens actuator and a driving amount of the second camera shake correction lens system driven by the second lens actuator is minimized, and controls the -th lens actuator and the second lens actuator with reference to the adjustment table.

5. The binocular telescope of any of claims , wherein the first and second arms are substantially parallel,

the arithmetic device calculates the distance to the observation target object based on a phase difference between the laser light emitted from the laser light source and the laser light received by the light receiving element.

6. The binocular telescope of any of claims , wherein the first and second arms are substantially parallel,

the th camera shake correcting lens system and the second camera shake correcting lens system are disposed at positions symmetrical to the camera shake detecting sensor on both sides of the camera shake detecting sensor.

A method of manufacturing a binocular telescope having a function of measuring a distance to an object to be observed, the method comprising the steps of:

preparing a binocular shell;

mounting pairs of objective lens systems, pairs of eyepiece lens systems, pairs of camera shake correction lens systems, a lens actuator that drives pairs of camera shake correction lens systems, a control device that controls the lens actuator, a laser light source that emits laser light for distance measurement, a light-receiving element that receives laser light reflected by the observation object, and an arithmetic device that calculates a distance to the observation object based on the received laser light, to the binocular shell;

adjusting control parameters of the control means to drive the -side hand shake correcting lens systems in synchronization with each other, and

and storing the adjusted control parameters into a memory of the control device.

Technical Field

The present invention relates to kinds of binoculars, and more particularly to kinds of binoculars having a function of measuring a distance to an object to be observed, and a method for manufacturing the same.

Background

Jp 2004-101342 a (patent document 1) describes a laser rangefinder having a binocular optical system in which pairs of right image prisms are arranged between pairs of objective lenses and pairs of eye lenses, a transmitting portion that emits laser light irradiates a target object with laser light via right image prisms and objective lenses, the laser light reflected at the target object is received by a receiving portion via another right image prisms, a time from the emission of the laser light by the transmitting portion until the laser light is received by the receiving portion is measured by a measuring unit, a distance to the target object is calculated based on the time, and further is configured to support the right image prisms by a single suspension , and the right image prisms are attitude-controlled by an anti-shake unit such that pairs of right image prisms are fixed to an inertial system.

Prior art documents

Patent document

Patent document 1: japanese patent laid-open publication No. 2004-101342

Disclosure of Invention

Problems to be solved by the invention

However, in the invention described in patent document 1, since the image blur of the target object is corrected by driving the erecting prism provided in the optical system, there are problems that the range of the image blur can be corrected and the correction accuracy of the image blur is strongly restricted, and in the invention described in patent document 1, is fixed to and driven by a single suspension to correct the image blur of the target object, and therefore it is difficult to correct the image blur with high accuracy, that is, the suspension structure of the invention described in patent document 1 cannot accurately control the laser light path to be transmitted and the laser light path to be received, and therefore, there is a case where a measurement error occurs even if the transmission of the laser light is accurately performed, and sufficient distance measurement performance cannot be obtained.

Accordingly, in order to further improve the accuracy of distance measurement by using both the distance measurement function of transmitting and receiving laser light and the image blur correction function of correcting image blur by anti-blur, it is an object of the present invention to provide anti-blur functions and a method of manufacturing a device having the anti-blur function, in which the accuracy of distance measurement is improved by independently controlling anti-blur by left and right lenses to optimize the optical path of laser light.

Means for solving the problems

In order to solve the above problems, the present invention includes a binocular telescope housing, a pair of objective lens systems, a pair of eyepiece lens systems, a pair of eyepiece lens systems, wherein the eyepiece lens systems magnify images formed by a pair of objective lens systems, respectively, 2 a pair of hand shake correction lens systems, a pair of hand shake correction lens systems, respectively, disposed on an optical path between the objective lens systems and the eyepiece lens systems, for stabilizing images formed by a pair of objective lens systems, respectively, a shake detection sensor detecting a shake of the binocular telescope housing, a th lens actuator driving a second hand shake correction lens system in the hand shake correction lens systems in a plane orthogonal to an optical axis, a second lens actuator driving a second hand shake correction lens system in the hand shake correction lens systems in a plane orthogonal to the optical axis, and a control device controlling the second lens actuator and the second lens actuator independently based on a detection signal obtained by the shake detection sensor, and a control device controlling the second lens actuator and the second lens actuator based on a shake correction lens system, and a distance of the second lens actuator, wherein the object is calculated by a laser beam receiving device, and a distance of the object receiving device is calculated by the objective lens system, and the objective lens system, wherein the objective lens system is received by the objective lens system, the distance measuring device is calculated by the objective lens system, the objective lens system is adjusted by the objective lens system, and the objective lens system is adjusted by the objective lens system, and.

In the present invention thus constituted, an image formed by the object lens system attached to the binocular housing is enlarged by , a -pair camera shake correction lens system for stabilizing the image is disposed on the optical path between the object lens system and the eyepiece system, and these camera shake correction lens systems are driven in the plane orthogonal to the optical axis by the -th lens actuator and the second lens actuator, respectively, the camera shake of the binocular housing is detected by a shake detection sensor, and the image is stabilized by controlling the lens actuators based on the detected detection signal, and is further provided, a laser light source built in the binocular housing emits a laser light for distance measurement from the -th objective lens system via the -pair camera shake correction lens system, the laser light emitted from the -th objective lens system and reflected by the object to be observed is received by the light receiving element via the second objective lens system and the second camera shake correction lens system, and the arithmetic means calculates the distance to the object to be observed based on the received laser light.

According to the present invention configured as described above, the hand shake correction lens system disposed on the optical path between the objective lens system and the eyepiece lens system is driven in the plane orthogonal to the optical axis to correct image shake, and therefore image shake can be corrected with high accuracy within the range , and further, the th lens actuator and the second lens actuator are controlled so as to synchronize the vertical positions of the respective images formed by the th objective lens system and the second objective lens system, and therefore, the distance to the observation target object can be measured with high accuracy.

The present invention is a method for manufacturing kinds of binoculars having a function of measuring a distance to an observation target object, comprising the steps of preparing a binocular housing, mounting pairs of objective lens systems, pairs of eyepiece lens systems, pairs of hand shake correction lens systems, lens actuators for driving the pairs of hand shake correction lens systems, shake detection sensors, a control device for controlling the lens actuators, a laser light source for emitting laser light for distance measurement, a light receiving element for receiving the laser light reflected by the observation target object, and an arithmetic device for calculating the distance to the observation target object based on the received laser light, adjusting control parameters of the control device to drive the pairs of hand shake correction lens systems in synchronization with each other, and storing the adjusted control parameters in a memory of the control device.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the binocular telescope and the method for manufacturing the same of the present invention, image blur can be corrected with high accuracy, and the accuracy of distance measurement can be improved.

Drawings

Fig. 1 is a sectional view of a binocular telescope of an embodiment of the present invention.

Fig. 2 is a diagram schematically showing examples of output signals from the shake detection sensors in the binocular telescope according to the embodiment of the present invention.

Fig. 3 is a diagram schematically showing the relationship between the angular velocity, the shake angle, and the lens movement amount, which are obtained based on the output signals of the shake detection sensors in the binocular telescope according to the embodiment of the present invention.

Fig. 4 is a flowchart showing a manufacturing process of the binocular telescope of the embodiment of the present invention.

Fig. 5 is a flowchart of control of the lens actuator in the binocular telescope of the embodiment of the present invention.

Fig. 6 is a view schematically showing the emission of the distance measuring laser beam from the laser light source and the reception of the reflected light from the observation target in the binocular telescope according to the embodiment of the present invention.

Detailed Description

[ binocular telescope ]

A binocular telescope of an embodiment of the present invention is described with reference to the accompanying drawings.

Fig. 1 is a sectional view of a binocular telescope of an embodiment of the present invention.

As shown in fig. 1, the binocular 1 of the present embodiment has a binocular housing 2, pairs of objective lens systems 4a, 4b mounted to the binocular housing, pairs of eyepiece lens systems 6a, 6b mounted to the binocular housing 2, pairs of hand shake correction lens systems 8a, 8b, the pairs of hand shake correction lens systems 8a, 8b stabilizing an image formed by the objective lens systems, lens actuators 10a, 10b, the lens actuators 10a, 10b driving the hand shake correction lens systems, a shake detection sensor 12 detecting a shake of the binocular housing 2, and a control device 14 controlling the lens actuators based on a detection signal of the shake detection sensor 12.

As shown in fig. 1, the binocular housing 2 is a metal housing, is attached to the front end of the binocular housing 2 so as to be aligned in the left-right direction with respect to the objective lens systems 4a, 4b, is attached to the rear end of the binocular housing 2 so as to be aligned in the left-right direction with respect to the eyepiece lens systems 6a, 6b, and the binocular housing 2 is configured to be substantially symmetrical in the left-right direction.

(lens system)

The objective lens systems 4a and 4b are lens systems attached to the front ends of the binocular telescope housing 2, respectively, and are configured to form an image of an observation target, and in the present embodiment, the objective lens systems 4a and 4b each include two lenses, but the objective lens systems may be configured by lenses or three or more lenses, and in the present embodiment, is configured to allow of the objective lens systems 4a and 4b to be the objective lens to emit distance measurement laser light from the laser light source 16, and of the objective lens systems 4b are configured to allow laser light reflected by the observation target to be incident as the second objective lens.

The eyepiece systems 6a and 6b are lens systems attached to the rear ends of the binocular telescope housing 2, respectively, and the eyepiece system 6a of the eyepiece systems 6a and 6b is arranged to magnify the image formed by the objective lens system 4a, and the eyepiece system 6b is arranged to magnify the image formed by the objective lens system 4 b.

(hand shake correction mechanism)

The camera-shake correction lens systems 8a and 8b are lenses disposed on the optical path between the objective lens system and the eyepiece lens system in the binocular telescope housing 2, and the camera-shake correction lens system 8a of these camera-shake correction lens systems 8a and 8b is disposed on the optical path between the objective lens system 4a and the eyepiece lens system 6a, and the camera-shake correction lens system 8b is disposed on the optical path between the objective lens system 4b and the eyepiece lens system 6 b.

The lens actuators 10a and 10b are configured to support the camera-shake correction lens systems 8a and 8b, respectively, and to translate the camera-shake correction lens systems 8a and 8b in a plane orthogonal to the optical axes a1 and a 2. In the present embodiment, the two lens actuators 10a and 10b are configured to separately hold the two camera-shake correction lens systems 8a and 8b so as to be independently drivable. In the binocular 1 of the present embodiment, the camera shake correction lens systems 8a and 8b are each translated in a plane orthogonal to the optical axis in accordance with the shake of the binocular housing 2 detected by the shake detection sensor 12, thereby correcting the optical path to stabilize the formed image.

Specifically, each of the lens actuators 10a and 10b includes a moving frame to which the camera-shake correction lens system is attached, a support unit that supports the moving frame so as to be able to translate the moving frame with respect to the fixed portion, and a plurality of linear motors (not shown) that drive the moving frame with respect to the fixed portion. Thus, the controller 14 causes currents to flow through the drive coils (not shown) of the linear motors, respectively, to generate driving forces, thereby causing the movable frame to translate with respect to the fixed portion. As described above, although the voice coil type actuator using a plurality of linear motors is used as the lens actuator in the present embodiment, any other type of actuator can be used as the lens actuator.

The shake detection sensor 12 is a sensor that is attached to the inside of the binocular housing 2 in order to detect shake of the binocular housing 2, and is disposed on an axis of symmetry of the binocular housing 2 that is formed substantially bilaterally symmetrically. In other words, the camera shake correction lens systems 8a and 8b are disposed at symmetrical positions with respect to the shake detection sensor 12 on both sides of the shake detection sensor 12. In the present embodiment, the shake detection sensor 12 includes two piezoelectric vibration gyroscopes (not shown). These piezoelectric vibration gyroscopes detect the shake angular velocities of the binocular housing 2 in the pitch (pitch) direction and the yaw (yaw) direction, respectively, and calculate the shake angle in each direction by integrating the electrical signal representing the angular velocity with time. The camera shake correction lens systems 8a and 8b are translated so as to bend the optical axes based on the calculated shake angles, thereby eliminating the shake angles and stabilizing the formed image. The processing of the detection signal obtained by the shake detection sensor 12 will be described later.

Specifically, the control device 14 may include a microprocessor, a memory, an a/D converter, a D/a converter, an interface circuit, a lens actuator drive circuit, and software for operating the same (not shown in the above description), and the control device 14 may integrate the detection signal obtained by the shake detection sensor 12 with time to calculate shake angles in the pitch direction and the yaw direction, and then calculate positions to which the hand shake correction lens systems 8a and 8b are to be moved in order to cancel the calculated shake angles in the respective directions, is a step of inputting a signal indicating the current positions of the hand shake correction lens systems 8a and 8b from the respective lens actuators 10a and 10b to the control device 14, and the control device 14 is a step of multiplying a deviation between the position to which the hand shake correction lens systems are to be moved and the current positions of the hand shake correction lens systems by a predetermined feedback gain to set a current flowing to coils (not shown in the drawings) of the linear motors of the lens actuators, and outputting the current.

The binocular telescope 1 of the present embodiment is configured in such a manner that the shake detection sensor 12 detects the shake of the binocular housing 2, and the control device 14 controls the lens actuators 10a, 10b based on the shake to move the camera shake correction lens systems 8a, 8b in the plane orthogonal to the optical axis. This stabilizes the image formed by the objective lens systems 4a and 4b, and allows the user to view a stable image of the observation target.

(distance measuring means)

The binocular telescope 1 according to the present embodiment includes a laser light source 16 that emits laser light for distance measurement from objective lens systems, a light projection lens 18, a light projection splitter prism 20, a light receiving element 22 that receives laser light emitted from the laser light source 16 and reflected by an object to be observed, a light receiving lens 24, a light receiving splitter prism 26, an arithmetic device 28 that calculates a distance to the object to be observed based on the laser light received by the light receiving element 22, a display device 30 that displays the calculated distance, and a distance measurement switch 32.

The laser light source 16 is a laser diode disposed on the side of the optical axis a1 connecting the objective lens system 4a and the eyepiece lens system 6a, and is configured to emit infrared laser light for distance measurement. The laser light source 16 is configured to emit laser light to measure the distance to the observation target by the user operating a distance measuring switch 32 provided in the binocular housing 2. As shown in fig. 1, the laser light source 16 is arranged to emit laser light from a direction perpendicular to the optical axis a1 toward the optical axis a1, and the laser light enters the light-projecting separation prism 20 via the light-projecting lens 18.

The light projection split prism 20 is a rectangular prism disposed on an optical axis a1 connecting the objective lens system 4a and the eyepiece lens system 6a, and a half mirror surface 20a is formed on a plane connecting diagonally opposite to the light projection split prism 20 in a plan view, and the half mirror surface 20a is configured to reflect infrared light and transmit visible light, so that visible light incident from the objective lens system 4a and transmitted through the hand shake correction lens system 8a directly transmits through the light projection split prism 20 to reach the eyepiece lens system 6a, and further , infrared light emitted from the laser light source 16 is reflected at the half mirror surface 20a, and an optical path is bent by 90 ° to be parallel to the optical axis a1, whereby infrared light emitted from the laser light source 16 is reflected at the half mirror surface 20a, and is emitted from the objective lens system 4a to an observation target through the hand shake correction lens system 8 a.

The light receiving element 22 is a charge coupled device disposed on the side of the optical axis a2 connecting the objective lens system 4b and the eyepiece lens system 6b, and is configured to receive the infrared laser light reflected by the object to be observed. As shown in fig. 1, the light receiving element 22 is configured to receive light that is incident along the optical axis a2 and reflected by the light receiving separation prism 26.

The light receiving separation prism 26 is a rectangular prism disposed on the optical axis a2 connecting the objective lens system 4b and the eyepiece lens system 6b, and a half mirror surface 26a is formed on a plane connecting diagonal angles in a plan view of the light receiving separation prism 26, and the half mirror surface 26a is configured to reflect infrared light and transmit visible light, and therefore, the visible light that has entered from the objective lens system 4b along the optical axis a2 and has passed through the camera-shake correction lens system 8b passes through the light receiving separation prism 26 directly and reaches the eyepiece lens system 6b, and , and infrared light reflected by an object is reflected by the half mirror surface 26a to be observed, and the optical path is bent in a direction orthogonal to the optical axis a2, and thus, infrared light reflected by the object to be observed and entered from the objective lens system 4b is reflected by the half mirror surface 26a and enters the light receiving element 22 via the light receiving lens 24.

The arithmetic device 28 is configured to: a signal relating to the infrared laser beam emitted from the laser light source 16 and the infrared laser beam reflected by the object to be observed and received by the light receiving element 22 is input, and the distance to the object to be observed is calculated based on the phase difference between these laser beams. Specifically, the arithmetic device 28 may include a microprocessor, a memory, an interface circuit, and software for operating the same (not shown). The microprocessor, memory, and the like constituting the arithmetic device 28 may be shared with the control device 14, and the control device 14 and the arithmetic device 28 may be constituted by a single microprocessor, memory, and the like. Further, the arithmetic unit 28 may be configured to: the distance to the observation target object is calculated based on the time after the laser light is emitted from the laser light source 16 until the reflected light is received by the light receiving element 22.

The display device 30 is an LCD panel disposed on the optical axis a1 at a position between the light projection splitting prism 20 and the eyepiece system 6a, and is configured to display the distance to the observation target calculated by the arithmetic device 28. The LCD panel is transparent in normal use and does not obstruct the view of the user. When the user uses the distance measuring function, the distance calculated by the arithmetic device 28 is displayed at the corner of the LCD panel, and the distance to the observation target object is indicated in the field of view of the user who observes through the binocular telescope 1. As described above, although the distance measured in the present embodiment is displayed in the finder, the present invention may be configured such that the display device 30 is provided on the outer surface of the binocular housing 2 to display the distance on the surface of the binocular housing 2.

The binocular telescope 1 of the present embodiment is configured as described above, and thus, when the user operates the distance measuring switch 32, the laser light source 16 incorporated in the binocular housing 2 emits light, and the emitted laser light is projected onto the observation target via the light projection lens 18, the light projection splitting prism 20, the camera shake correction lens system 8a, and the objective lens system 4 a. The projected laser light is reflected by the observation target and received by the light receiving element 22 via the objective lens system 4b, the camera-shake correction lens system 8b, the light receiving splitter prism 26, and the light receiving lens 24. The arithmetic device 28 incorporated in the binocular housing 2 calculates the distance from the binocular 1 to the observation target based on the phase difference between the laser light emitted from the laser light source 16 and the laser light received by the light receiving element 22. The calculated distance to the observation target object is displayed by the display device 30 and indicated to the user via the eyepiece system 6 a.

[ control relating to hand shake correction ]

Next, processing of the detection signal of the shake detection sensor 12 in the control device 14 will be described with reference to fig. 2 and 3.

Fig. 2 is a diagram schematically showing examples of the output signal from the shake detection sensor 12, and fig. 3 is a diagram schematically showing the relationship among the angular velocity, the shake angle, and the lens movement amount obtained based on the output signal of the shake detection sensor 12.

As described above, in the present embodiment, the piezoelectric vibration gyro is used as the shake detection sensor 12, , and the output signal of the piezoelectric vibration gyro is output as a signal that fluctuates around the predetermined reference voltage as shown by the solid line in fig. 2, that is, when the angular velocity is zero, the output signal from the shake detection sensor 12 becomes the predetermined reference voltage R shown by the broken line in fig. 2, and the output voltage fluctuates around the reference voltage R according to the angular velocity acting on the shake detection sensor 12, and therefore, the voltage signal obtained by shifting the voltage shown by the solid line in fig. 2 by the amount corresponding to the reference voltage R is input to the a/D converter (not shown) provided in the control device 14.

Specifically, the input signal from the shake detection sensor 12 is converted into digital data by an a/D converter (not shown) of the control device 14, and the DC component is removed from the converted digital data by numerical calculation, and in image shake prevention control of an imaging camera or the like, the AC component is usually extracted by removing a signal component of 0.1Hz or less as the DC component by a high-pass filter, but in the present embodiment, stability is improved by using a lower cutoff frequency.

Next, signal processing in the control device 14 will be described with reference to fig. 3.

As described above, the waveform of the angular velocity signal containing the DC component indicated by the solid line in fig. 2 is input to the a/D converter (not shown) of the control device 14, and the DC component is removed after conversion into digital data, the solid line in fig. 3 indicates example of the angular velocity signal from which the DC component has been removed, the image blur correction control in the binocular telescope 1 of the present embodiment is to stabilize the formed image by bending the optical axis by the hand blur correction lens systems 8a, 8b to cancel the blur angle of the binocular housing 2 in the pitch direction and the yaw direction, and therefore, it is necessary to generate a signal of the blur angle based on the angular velocity signal indicated by the solid line in fig. 3.

Specifically, the microprocessor (not shown) of the control device 14 numerically integrates the angular velocity signal indicated by the solid line in fig. 3 with time to generate a signal of the shake angle indicated by the broken line in fig. 3. The shake detection sensor 12 is configured to detect shake angular velocities in the pitch direction and the yaw direction, and to calculate shake angles in the pitch direction and the yaw direction by integrating these angular velocity signals. Here, when the DC component of the integrated angular velocity signal is not sufficiently removed, the DC component is accumulated due to the time integration thereof, and a large deviation occurs in the signal of the shake angle. In the present embodiment, since the DC component is removed at a low cutoff frequency, a signal of the shake angle can be obtained with high accuracy.

The control device 14 calculates target positions (movement amounts from the initial positions) of the hand-shake correction lens systems 8a and 8b capable of eliminating the shake angles based on the calculated shake angles, and in the present embodiment, the movement amounts (target positions) of the hand-shake correction lens systems 8a and 8b capable of eliminating the shake angles of the binocular housing 2 are substantially proportional to the shake angles of the binocular housing 2, and therefore the waveforms of the movement amounts of the hand-shake correction lens systems 8a and 8b indicated by the chain lines in fig. 3 are substantially similar to the waveforms of the shake angles indicated by the broken lines, and in reality, the shake angles in the pitch direction and the yaw direction are calculated, respectively, and the target positions X1 in the horizontal direction of the hand-shake correction lens systems 8a and 8b and the target positions Y1 in the yaw direction of the hand-shake correction lens systems 8a and 8b for eliminating the shake angles in the pitch direction are calculated.

The control device 14 transmits a drive signal to the lens actuators 10a and 10b, and causes the camera-shake correction lens systems 8a and 8b to translate toward a target position in a plane orthogonal to the optical axis, thereby bending the optical axes a1 and a2, and thereby eliminating the camera-shake angle in each direction of the binocular housing 2 and stabilizing the formed image, that is, the control device 14 controls the th lens actuator 10a and the second lens actuator 10b so as to synchronize the positions in the vertical direction and the horizontal direction of each image formed by the th objective lens system 4a and the second objective lens system 4b, respectively.

First, the lens actuators 10a and 10b detect the horizontal direction position X2 and the vertical direction position Y2 of the camera-shake correction lens systems 8a and 8b, and output these detection signals to the control device 14 in time series. The control device 14 calculates deviations Rx (═ X1-X2) and Ry (═ Y1-Y2) between signals X2 and Y2 indicating the positions of the camera-shake correction lens systems 8a and 8b input from the lens actuators 10a and 10b and target positions X1 and Y1 of the camera-shake correction lens systems 8a and 8b for image shake removal, respectively. The controller 14 causes currents having values obtained by multiplying the deviations Rx and Ry by the feedback gains to flow through the driving coils of the lens actuators 10a and 10 b. By repeating this control, the camera shake correction lens systems 8a and 8b move independently of each other to track the target positions X1 and Y1 set in accordance with the shake of the binocular housing 2, thereby stabilizing the image.

[ production method ]

Next, a method for manufacturing a binocular telescope according to an embodiment of the present invention will be described with reference to fig. 4. Fig. 4 is a flowchart showing a manufacturing process of the binocular telescope.

First, in step S1 of fig. 4, components constituting the binocular housing 2 of the binocular 1 are prepared.

Next, in step S2, pairs of objective lens systems 4a, 4b and pairs of eyepiece lens systems 6a, 6b are mounted to the prepared components of the binocular housing 2.

In step S3, the lens actuators 10a, 10b that support the camera-shake correction lens systems 8a, 8b, respectively, are attached to the components of the binocular housing 2.

In step S4, the shake detection sensor 12 and the control device 14 for controlling the lens actuators 10a and 10b are attached to the components of the binocular housing 2.

In step S5, the laser light source 16 that emits laser light for distance measurement, the light receiving element 22 that receives laser light reflected by the object to be observed, and the arithmetic device 20 that calculates the distance to the object to be observed based on the received laser light are attached to the components of the binocular telescope housing 2. Further, a light projecting lens 18, a light projecting split prism 20, a light receiving lens 24, a light receiving split prism 26, and a display device 30 are attached to the components of the binocular telescope housing 2. The steps S3 to S5 are not particularly limited, and the order may be arbitrarily determined according to the efficiency of production and the arrangement of the components.

Next, in step S6, control parameters for driving the control device 14 for the camera shake correction lens systems 8a and 8b are adjusted, specifically, the difference between the left and right anti-shake characteristics is adjusted so as to minimize the difference between the left and right anti-shake characteristics, and the difference between the left and right anti-shake characteristics includes, for example, the characteristics of the left and right camera shake correction lens systems 8a and 8b themselves, the characteristics of the left and right lens actuators 10a and 10b (the driving amount of the lenses, etc.), the characteristics of the left and right mechanisms, and the like.

For example, when the same control parameters are output from the control device 14, the drive amounts by which the respective camera shake correction lens systems 10a, 10b are driven by the lens actuators 10a, 10b are different (that is, when there is a difference in anti-shake performance), the images imaged on the left and right sides are not synchronized, and the optical path of the laser light used for distance measurement cannot be synchronized on the transmission side and the reception side either.

Finally, in step S7, the adjustment in step S6 is stored in the memory (not shown) of the control device 14 in the form of an adjustment table, whereby the binocular telescope 1 can improve the accuracy of distance measurement when used by the user.

It is preferable that performs the adjustment of the control parameters in step S6 while checking the left and right images by a dedicated testing machine and checking the performance difference . regarding the anti-shake performance, as described above, it is important to perform the adjustment so that the difference in the left and right anti-shake performance is minimized as a whole rather than maximizing the individual performance, and the adjustment value is stored in the memory in step S7 (not shown).

Next, the operation of the binocular telescope 1 according to the embodiment of the present invention will be described with reference to fig. 5 and 6.

Fig. 5 is a flowchart of control of the lens actuators 10a and 10b in the binocular telescope 1 according to the present embodiment. Fig. 6 is a diagram schematically showing the emission of the distance measuring laser light from the laser light source 16 and the reception of the reflected light from the observation target object in the binocular telescope 1 according to the present embodiment. The flowchart shown in fig. 5 is a process repeatedly executed at predetermined time intervals during the operation of the hand-shake correction function in the binocular telescope 1.

First, in step S11 of fig. 5, detection signals of the shake angular velocity in the pitch direction and the yaw direction are input from the shake detection sensor 12 as the piezoelectric gyro sensor to the control device 14. In this manner, since the two lens actuators 10a and 10b are controlled based on the detection signal of the single shake detection sensor 12, the operation of each lens actuator is not varied by the detection signal.

Next, in step S12, the detection signal input from the shake detection sensor 12 to the control device 14 is subjected to high-pass filtering (not shown) to remove the DC component in the detection signal, that is, the signal indicated by the solid line in fig. 2 is converted into a signal indicated by the dash-dot line.

In step S13, the shake angle of the binocular housing 2 is calculated by time-integrating the detection signal of the shake angular velocity from which the DC component is removed. That is, the signal indicated by the solid line in fig. 3 is converted into the signal indicated by the broken line.

In step S14, the target position X1 (the movement amount from the initial position) of the right lens actuator 10a is calculated based on the shake angle in the yaw direction calculated in step S13, and the target position Y1 (the movement amount from the initial position) is calculated based on the shake angle in the pitch direction, that is, the signal indicated by the broken line in fig. 3 is converted into the signal indicated by the chain line , specifically, the target positions X1 and Y1 are calculated by multiplying the calculated shake angle by the proportional coefficient (gain) between the shake angle and the movement amount of the hand shake correction lens system and the adjustment value for the right lens actuator 10a stored in advance as a control parameter in a memory (not shown) in step S7 of the flowchart shown in fig. 4.

In step S15, the target position X1 (movement amount from the initial position) of the left lens actuator 10b is calculated based on the shake angle in the yaw direction calculated in step S13, and the target position Y1 (movement amount from the initial position) is calculated based on the shake angle in the pitch direction. Specifically, the target positions X1 and Y1 are calculated by multiplying the calculated shake angle by a proportional coefficient (gain) between the shake angle and the movement amount of the camera shake correction lens system and an adjustment value for the left lens actuator 10b stored in a memory (not shown) as a control parameter.

Here, since the adjustment values for the right side and the left side stored in the memory (not shown) are usually different, the target positions X1 and Y1 for the right lens actuator 10a and the target positions X1 and Y1 for the left lens actuator 10b calculated in step S14 are slightly different values. In this manner, by providing different target positions X1, Y1 for the right and left lens actuators, individual differences in the lens actuators and the like are offset.

Next, in step S16, the control device 14 calculates the operation amounts (the current values flowing through the driving coils (not shown) of the lens actuators) for the lens actuators 10a and 10b using the target positions X1 and Y1 set in steps S14 and S15, respectively, and controls the lens actuators, thereby driving the two lens actuators 10a and 10b, respectively, so that the images corrected by the left and right camera-shake correction lens systems 8a and 8b are synchronized to become an image that is sufficiently on the right and left sides.

Next, the distance measurement performed by the binocular telescope 1 according to the embodiment of the present invention will be described with reference to fig. 6. Fig. 6 shows only the configuration related to the distance measuring function of the binocular telescope 1 according to the present embodiment.

First, when a user using the binocular 1 measures the distance to the observation target T, the distance measuring function is turned on by operating the distance measuring switch 32 (fig. 1) provided in the binocular housing 2. As a result, the laser light source 16 incorporated in the binocular telescope 1 emits infrared laser light for distance measurement, and the laser light is emitted through the light projection lens 18, the light projection split prism 20, the camera shake correction lens system 8a, and the objective lens system 4 a. Thereby, the laser light is irradiated to the observation target T at a predetermined position within the field of view of the binocular telescope 1. The position of the laser irradiation corresponds to a position P1 within the field Va of the right objective lens system 4 a. At this time, since the camera shake correction lens systems 8a and 8b are driven in accordance with the shake of the binocular telescope 1 to correct the shake of the image, the user can easily bring the observation target T into the field of view of the binocular telescope 1. Further, since the laser light for distance measurement is also irradiated through the camera shake correction lens system 8a, the laser light is irradiated to a predetermined position within the field of view corrected by the camera shake correction lens system 8 a. Therefore, the user can easily irradiate (shine) the observation target T with the laser light for distance measurement.

The laser light irradiated to the observation target T is reflected and returned to the objective lens systems 4a and 4b of the binocular telescope 1. Here, since the two camera shake correction lens systems 8a and 8b are driven in synchronization with each other, the laser beam emitted from the objective lens system 4a, reflected, and returned to the objective lens system 4b is refracted similarly to the emission, and an image is formed at a position P2 in the field of view Vb of the left-hand objective lens system 4 b. The position P2 in the left field Vb corresponds to the position P1 in the right field Va from which the laser beam is emitted. That is, the laser light emitted from the right objective lens system 4a and reflected to return to the left objective lens system 4b returns to the same position P2 in the left field Vb as the emission position P1 of the laser light in the right field Va. Therefore, the light receiving element 22 can reliably receive the laser light reflected from the observation target T. The light receiving element 22 that receives the reflected laser light may be configured to be able to receive only the laser light returned to the vicinity of the position P2 corresponding to the position P1 of the laser light source 16 in the field of view, and the light receiving element 22 may be configured to be small.

On the other hand, as shown by the imaginary line in fig. 6, when the right correction lens system 8a and the left correction lens system 8b are not sufficiently synchronized, the laser light incident on the left objective lens system 4b is returned to a position different from the emission position (a position not corresponding to the emission position) in the field of view. Therefore, the returned laser light cannot be reliably received by a small-sized light receiving element. In such a case, a large-sized light receiving element is also required to receive the laser light, which increases the cost.

The arithmetic device 28 calculates the distance from the binocular telescope 1 to the observation target T based on the phase difference between the laser beam emitted from the laser light source 16 and the laser beam received by the light receiving element 22, and displays the distance on the display device 30. The user can confirm the measured distance within the visual field of the binocular telescope 1. In the binocular telescope 1 according to the embodiment of the present invention, the accuracy of the measured distance is improved by about 20% by synchronously driving the two camera shake correction lens systems 8a, 8 b.

According to the binocular telescope 1 of the embodiment of the present invention, since the camera shake correction lens systems 8a and 8b of disposed on the optical paths between the objective lens systems 4a and 4b and the eyepiece lens systems 6a and 6b are driven in the plane orthogonal to the optical axes a1 and a2, and the camera shake of the image is corrected with high accuracy within the range of (fig. 1), the laser light emitted through the th camera shake correction lens system 8a and reflected by the observation target is received by the light receiving element 22 through the second camera shake correction lens system 8b, and therefore, the laser light for distance measurement can be reliably irradiated to the observation target T, and the laser light reflected from the observation target T can be reliably received, and the distance to the observation target T can be measured with high accuracy (fig. 6).

Further, according to the binocular telescope 1 of the present embodiment, the lens actuators 10a, 10b hold and independently drive the th and second camera shake correction lens systems 8a, 8b, respectively, and therefore the two camera shake correction lens systems 8a, 8b can be independently driven, and therefore, images corrected by the respective camera shake correction lens systems 8a, 8b can be sufficiently synchronized, and the reflected light of the laser light emitted from the laser light source 16 can be reliably received by the light receiving element 22.

Further, according to the binocular telescope 1 of the present embodiment, the arithmetic device 20 calculates the distance to the observation target based on the phase difference between the laser light emitted from the laser light source 16 and the laser light received by the light receiving element 22, and therefore the distance measurement is less susceptible to disturbance, and the distance to the observation target can be measured with high accuracy.

Further, according to the binocular telescope 1 of the present embodiment, the laser light source 16 is configured to emit laser light from the predetermined position P1 within the visual field Va of the th objective lens system 4a, and the light receiving element 22 is disposed to receive the laser light incident at the position P2 within the visual field Vb of the second objective lens system 4b corresponding to the emission position P1 of the laser light within the visual field Va of the th objective lens system 4 a. therefore, by driving the two camera-shake correction lens systems 8a, 8b in sufficient synchronization, even when the light receiving element 22 having a narrow light receiving range is used, the laser light can be reliably received, and the cost of the light receiving element 22 can be reduced.

Further, according to the binocular telescope 1 of the present embodiment, the th and second camera shake correction lens systems 8a and 8b are disposed at positions symmetrical to the camera shake detection sensor 12 on both sides of the camera shake detection sensor 12, whereby the camera shake detection sensor 12 is disposed at a position equidistant from the two camera shake correction lens systems, and the deviation based on the camera shake angle detected by the camera shake detection sensor 12 is equal to the two camera shake correction lens systems, so that the driving of the two camera shake correction lens systems 8a and 8b can be easily synchronized.

Further, according to the method of manufacturing the binocular telescope 1 of the present embodiment, the control parameters of the control device 14 are adjusted so that the camera shake correction lens systems 8a and 8b are driven in synchronization with each other (step S6 in fig. 5), and as a result, even when there is an individual difference between the lens actuators 10a and 10b and the camera shake correction lens systems 8a and 8b, images corrected by the two camera shake correction lens systems 8a and 8b can be sufficiently synchronized, and the accuracy of measuring the distance to the observation target object can be improved.

Although the preferred embodiments of the present invention have been described above, various modifications can be made to the above embodiments.

Description of the reference numerals

1: a binocular telescope; 2: a binocular housing; 4a, 4 b: an objective lens system; 6a, 6 b: an eyepiece system; 8a, 8 b: a hand shake correction lens system; 10a, 10 b: a lens actuator; 12: a shake detection sensor; 14: a control device; 16: a laser light source; 18: a lens for light projection; 20: a separation prism for light projection; 20 a: a semi-transparent semi-reflective mirror surface; 22: a light receiving element; 24: a light receiving lens; 26: a separation prism for receiving light; 26 a: a semi-transparent semi-reflective mirror surface; 28: an arithmetic device; 30: a display device; 32: and a distance measuring switch.